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Email QR Code Generator

Scan it and a new message opens, already addressed, with the subject and body you wrote. Nothing sends until the person presses send.

Fill in the subject. A code that opens a blank message is the one people close, and the subject is the cheapest field here.

Add your link or content

Scanning opens a new email with these filled in, ready to send. Nothing is sent by scanning.

A blind copy is only blind to the recipient. Anyone scanning the code can read it.

Customize your QR code

Finder squares stay square whichever you pick. They are what a scanner locates the code with.

The blank margin scanners need. 4 is the standard minimum.

Download your QR code

Your code appears here as you type.

What the Subject and Body Cost You in Millimetres

Everything you prefill goes inside the code. The address is a few dozen characters; a paragraph of body text is several hundred, and that pushes the symbol up through versions until it needs to be printed noticeably larger to stay readable.

Here is the same address four ways, with the exact link each one produces and the smallest width it survives at.

What you enterWhat the scanner readsVersionModulesPrint at least
Address onlyOpens a blank message. Smallest possible code.mailto:hello@example.com24 characters23313.2 mm
Address and subjectThe version that actually gets sent, because the sender knows what to say.mailto:hello@example.com?subject=Table%201243 characters33714.8 mm
Subject and a short bodyA form in an email. Three prompts is about where this stays practical.mailto:hello@example.com?subject=Repair%20request&body=Unit%20number%3A%0AProblem%3A%0ABest%20time%20to%20call%3A113 characters75321.2 mm
Subject and a paragraphWhere the idea stops being free. Compare the last column to the first row.mailto:hello@example.com?subject=Booking%20enquiry&body=Hello%2C%20I%20would%20like%20to%20ask%20about%20availability%20for%20a%20table%20on%20a%20weekend%20evening%20in%20the%20next%20month%2C%20for%20a%20party%20of%20six%20people%2C%20and%20whether%20you%20can%20seat%20us%20outside.285 characters127329.2 mm
One address, four amounts of prefilled text. Measured at error correction level M by the same encoder the tool above uses, and every row decoded back before it was published.

The practical reading: a subject is close to free, a three-line prompt is affordable, and a written-out paragraph is not. If you need people to send you a lot of structured information, a form behind a short link stays small no matter how many questions you ask.

The Reason These Sometimes Do Nothing

A mailto link is a request for the phone's default mail app. If there is one, the draft opens. If there is not, nothing happens, and the person scanning has no idea why. That is common on phones where mail is read in a browser tab rather than an app, and it is not something a generator can fix, because the behaviour belongs to the phone.

So print the address as text next to the code. It costs one line and it is the difference between a dead end and a slower route. The same rule applies to the phone and SMS codes.

What This Does Not Do

  • It does not send anything. The code opens a draft, and the person decides. There is no way to make a QR code send mail on its own, and you should be suspicious of anything claiming otherwise.
  • A bcc address is not hidden. Anyone who scans the code can read it in the draft, and any scanner app shows the raw link first. The tool warns you when you add one.
  • No attachments. The mailto format carries text, so a file has to live somewhere with a link to it.
  • It carries an address, not a person. If you want your name, title and number to land in the phone's address book, the contact card tool does that, at the cost of a much denser code. On a printed CV that size difference is usually the deciding factor.
  • Static, so the address is fixed once printed. Changing it means reprinting. A dynamic code is the alternative when the destination has to change.
  • Spaces in the subject are percent-encoded rather than written as a plus, which is what RFC 6068 asks for. Generators that get this wrong put a literal plus in the subject line.

Email QR Code Questions

What happens when someone scans an email QR code?

Their phone opens a new message with the address already filled in, plus the subject and body if you set them. Nothing is sent until they press send. On iPhone that means Mail, on Android it means whichever mail app is set as default.

Why does my email QR code do nothing on some phones?

A mailto link needs a mail app installed and set as the default handler. Somebody who reads mail only in a browser tab often has no default, so the link opens nothing. If the code is going somewhere public, put the address underneath as text so there is always a way through.

Can I prefill the subject and message?

Yes, and you should fill in at least the subject. A code that opens an empty message usually gets abandoned. Both go inside the code, so keep the body short: the table on this page shows a paragraph adding several millimetres to the smallest size you can print at.

Is a bcc address hidden in a QR code?

No. Blind copy is blind to the people who receive the mail, not to the person sending it. Anyone who scans the code sees the bcc address in the draft before they send, and any scanner app shows the raw link. The tool warns about this when you add one.

How small can I print an email QR code?

It depends entirely on what you prefilled. The tool prints the minimum width under the preview, calculated from the module count at roughly 0.4mm per module. An address on its own is comfortably smaller than the same address carrying a prefilled paragraph.

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